CN1615214A - Method for producing double-wall corrugated tube - Google Patents

Method for producing double-wall corrugated tube Download PDF

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Publication number
CN1615214A
CN1615214A CNA028271963A CN02827196A CN1615214A CN 1615214 A CN1615214 A CN 1615214A CN A028271963 A CNA028271963 A CN A028271963A CN 02827196 A CN02827196 A CN 02827196A CN 1615214 A CN1615214 A CN 1615214A
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CN
China
Prior art keywords
wall
intercalation part
pin
bellows
double wall
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Granted
Application number
CNA028271963A
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Chinese (zh)
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CN100357085C (en
Inventor
原口秀人
长谷川升
津川大辅
浦部洋史
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Denka Co Ltd
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Denki Kagaku Kogyo KK
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Publication of CN1615214A publication Critical patent/CN1615214A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0025—Making articles of indefinite length, e.g. corrugated tubes subsequent mould cavities being different, e.g. for making bells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses
    • B29L2023/186—Pleated or corrugated hoses having a smooth internal wall

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

For simply and surely manufacturing a double wall corrugated pipe having a socked part of a predetermined shape without any deformation, in a method for manufacturing a double wall corrugated pipe 1 having a slot part 3 on one end and a socket part 2a on the other hand, an external wall 11 (21, 31) of a continuous irregular circular shape, and an inner wall 12 (22) of a cylindrical shape by subjecting a thermoplastic resin to extrusion molding, before the double wall corrugated pipe 1 to be extrusion-molded is cooled off, a pore is formed in an external wall 21 portion of the socket part 2a by piercing with a needle 5 to allow a hollow chamber23 of the socket part 2a to communicate with the air, so as to be designed to surely prevent shrinkage or deformation of an external wall 21 of the socket part 2b accompanied by a decrease in temperature.

Description

The manufacture method of double wall bellows
Technical field
The present invention relates to a kind of manufacture method of double wall bellows.Specifically, relate to by the reinforcement with concaveconvex shape with the inwall of the inboard thermal welding tubular of outer wall extrusion molding, generally with drainpipe and information case (box) manufacture method with the double wall bellows of use in the protection tube etc.
Background technology
At first, according to appended Fig. 8, the gross morphology of double wall bellows is described.Double wall bellows shown in the symbol 100 is by being cut after the continuously extruded shaping of thermoplastic resin, and at one end has socket portion 101, has a body that connects unit of intercalation part 102 at the other end.
This double wall bellows 100 by from outside watch the outer wall 103 that forms concaveconvex shape, form hollow chamber 104 and constituted by the inwall 105 of thermal welding at the tubular of the inboard of this outer wall 103.
Intercalation part 102 is removed among Fig. 8 with bag portion 106 that abandons shown in the imaginary line with prescriptive procedure cutting after shaping, have can the described socket of plug-in mounting portion 101 the internal face shape.
Here, in the manufacture method of aforesaid double wall bellows 100, in forming process, along with the bellows of formed thereby cools off gradually, reduced by the air pressures in the hollow chamber 104 of inside and outside wall obturation, before solidifying fully, outer wall deforms, thereby ruined tendency is arranged.
Particularly, in the bigger intercalation part 102 of the volume of hollow chamber, this tendency is very remarkable.If can not solve the problem of the distortion of this intercalation part 102, bring obstacle to the plug-in mounting of intercalation part 102 then can for socket portion 101.
So, all the time, in forming process, handle by adopting following method, that is, in the hollow chamber 104a of intercalation part 102, inject Compressed Gas, or in the inboard blank part 107 of bellows 100, insert and have the squeezer (not shown) of cutting the hole function and perforate on inwall.
For example, in the special fair 3-65262 communique of Japan, announcing has the method that forms the mitriform portion of single wall on double wall pipe.
In same communique, announce the manufacture method of the double wall pipe (double wall bellows) that following design is arranged, promptly, before the real cooling of pipe (bellows), on each mitriform part, in the inwall perforate, when keeping the shape of inwall, internally, the hollow chamber between the outer wall ventilates.
But, in this method in the past, need the injection device of Compressed Gas and pressure to adjust operation.In addition, the squeezer that also needs to be used for cutting the hole on inwall inserts the interior void portion of bellows, and cutting machine is provided and make the cutting machine action and on inwall the devices such as actuator of perforate.
That is, owing to more, also higher with the device cost related in addition, and be the formation of perforate on inwall in order to prevent the device number that outer wall distortion uses, so also ten minutes numerous and diverse of forming process.
Summary of the invention
So, the objective of the invention is to, provide a kind of can be simply and make the method for the double wall bellows of intercalation part reliably with regulation shape, this method does not need complicated and large-scale device group, complexity in preparing when not making in addition, and do not need complicated gas pressure adjustment.
The present invention adopts following means in order to solve the technical problem.At first, the manufacture method of the double wall bellows of following design is provided, be at one end to have socket portion by the thermoplastic resin extrusion molding is made, the other end has intercalation part, outer wall is continuous concaveconvex shape, inwall is the method for the double wall bellows of tubular (being not limited to cylindric), before the described double wall bellows cooling that is extruded, perforate on the intercalation part outer wall section with the pin puncture, by the intercalation part hollow chamber is communicated with atmosphere, prevent to be accompanied by the contraction distortion that temperature reduces the outer wall of the described intercalation part that produces.
And it is in the double wall bellows of the body made such as cylindrical shape, quadrangle, polygon that this manufacture method can be widely used in having by outward appearance.
Here, even the suitable outer wall position that pin thrust is the position that perforate also can not impact the quality of final products.That is, be the outer wall position of abandoning bag portion at the intercalation part place of the state after being extruded.And, so-called " abandoning a bag portion " is meant among the present invention, to be cut apart by a series of bellows of continuously extruded shaping at assigned position, acquisition is during as one of final products bellows that connects unit, the unnecessary position that is removed is the position of hollow chamber that forms the intercalation part in the inaccessible stage that is extruded.
Described means are the technological thoughts that wear device perforate on inwall from the regulation of utilizing the inboard blank part that inserts described intercalation part, design is significantly changed, select the outer wall of intercalation part, more particularly, select to be connected the described outer wall position of abandoning bag portion that is provided with and come perforating with intercalation part.In addition, for the operation of perforating on outer wall, the easy method that employing uses the easy member of pin and so on to pierce through.
When forming the hole on the outer wall position at intercalation part, be communicated with atmosphere by the hollow chamber of the inside and outside wall obturation of intercalation part, this hollow chamber pressure inside promptly reaches atmospheric pressure.Consequently, the distortion (destruction) of the intercalation part that brings of the minimizing that can prevent to follow temperature because of forming process to reduce the volume of the hollow chamber that produces effectively.
More particularly, can adopt following means, that is, described pin is installed on the metal pattern of intercalation part outer wall shaping usefulness, make it the action interlock with forming machine, pin be thrust to the intercalation part outer wall at official hour, thus perforate on this outer wall.
That is, in the manufacture method of the present invention in the employed forming machine, for the outer shape of the regulation that forms bellows, and essential multiple metal pattern is above a pair of down, and the order arrangement to stipulate, in forming process, this metal module turns round action integratedly repeatedly as crawler belt.Among the present invention, the metal pattern of the shaping of intercalation part outer wall is undertaken in selection from described metal module, on the assigned position of this metal pattern pin is installed, and makes it outstanding to resin side.This pin is when the shaping of intercalation part outer wall, and outstanding to the intercalation part outer wall of continuous shaping, the intercalation part hollow chamber is thrust in the syringe needle end.
Here, in the manufacture method of the present invention, the preferred especially pin that adopts is the tubular of the interior void that is communicated with atmosphere, has cephalic par and sees the inclined plane that is similar to the shape that is Japanese katakana " レ " from the side.
The so-called inclined plane of the shape that is approximate レ of seeing from the side is meant, cuts the shape that falls behind and form to the below of an inclination as the regulation top position from the head end of cylinder.And much less interior void portion is opened on the cephalic par of the pin that thrusts the intercalation part hollow chamber.
So long as the pin of described formation, approximately with stick a needle into the intercalation part outer wall in, just can the intercalation part hollow chamber be communicated with atmosphere via the interior void portion of pin.In addition, because the side sees that the cephalic par of the shape that is レ is very sharp-pointed, therefore very little at the fashionable frictional resistance of thorn.So, just can not be pressed into the outer wall that inserts intercalation part and make it crooked, thereby pin will promptly run through outer wall, easily thrust in the hollow chamber of intercalation part.
In addition, among the present invention, the inclined plane that makes the syringe needle end by employing is towards the formation of thrusting in the opposite direction with extrusion molding side, and this inclined plane compared towards with extrusion molding direction equidirectional the time, obviously can bring into play the effect of easier perforating.
Particularly, in the extrusion molding stage,, can bring into play described effect significantly sticking a needle under the situation that is connected the inclined wall of abandoning bag portion that is provided with intercalation part.
As mentioned above, the present invention has following technical meaning, that is, can constituting reliably with easy device, manufacturing has the double wall bellows of the intercalation part of the regulation shape of plug-in mounting socket portion reliably.
Description of drawings
Fig. 1 utilizes the intercalation part 2a of double wall bellows 1 of a succession of state of manufacture method extrusion molding of the present invention or the local appearance figure of socket portion 3 peripheries.
Fig. 2 is that expression utilizes the figure with a status of processes of the operation of bellows 1 shaping such as forming machine 6, extruder M.
Fig. 3 (A) is the part sectioned view of cephalic par 5b that is suitable for the pin 5 of manufacture method of the present invention, is the partial front elevation view of inclined plane 5c of the cephalic par 5b of the pin 5 seen from the arrow P direction of Fig. 2 (A) with figure (B).
Fig. 4 (A) is the figure of pin 51 that expression has the cephalic par of taper, is the figure of the pin 52 of the cephalic par of expression with inverted v-shaped with figure (B).
Figure (table) the 5th, the result's of expression experiment 1 table.
Figure (table) the 6th, the result's of expression experiment 2 table.
Fig. 7 (A) is the figure of perforate situation of the experiment No.1 of expression experiment 2, is the figure of perforate situation of the experiment No.2 of expression experiment 2 with figure (B).
Fig. 8 is the outside drawing of general double wall bellows 100 in the past.
The specific embodiment
Below with reference to accompanying drawings suitable embodiment of the present invention is described.
At first, Fig. 1 is the local appearance figure of the intercalation part periphery of the double wall bellows (being designated hereinafter simply as " bellows ") that utilizes manufacture method of the present invention extrusion molding under a succession of connection status.
Bellows 1 is provided with outer wall 11 with the concaveconvex shape that mainly forms in order to improve intensity, is had inwall 12 cylindraceous by thermal welding on the internal face part of this outer wall 11.
Outer wall 11 forms the described concaveconvex shape that is concatenated to form protuberance 14 and recess 15, in the inside of each protuberance 14, forms by the hollow chamber 13 of the ring-type of outer wall 11 and inwall 12 obturations.
And dress information case etc. in this interior void portion 4, when bellows 1 is utilized as drainpipe, to wherein water flowing, and when utilizing as protection tube, is then received by the interior void portion of the inboard of symbol among Fig. 14 expression inwalls 12.
In addition, bellows 1 every predetermined distance be provided with intercalation part 2a with protuberance longer than described protuberance 14, with the socket portion 3 of the adjacent shaping of intercalation part 2a of this shaping stage.
The symbol C in Fig. 1 of this intercalation part 2a and socket portion 3 1, C 2, C 3Separated by cutting on each shown position along Zhou Fangxiang.Like this, just can obtain a bellows (with reference to the symbol 100 of Fig. 8) that connects unit as final products.
In this cutting action, bag portion that abandons that represents with symbol 2c is removed, the intercalation part 2b that acquisition can plug-in mounting socket portion 3.
Here, in the inboard of the intercalation part 2a of shaping stage, form and (be designated hereinafter simply as " outer wall 21 " by intercalation part outer wall 21.) and intercalation part inwall 22 (be designated hereinafter simply as " inwall 22 ".) hollow chamber 23 of inaccessible approximate tubular.
This hollow chamber 23 is in forming process, and along with temperature reduces gradually, volume reduces, thereby the tendency of the negative pressure that generation draws in outer wall 21 is to the inside arranged.When making outer wall 21 flexural deformations because of this suction function, will in the plug-in mounting of socket portion 3, produce bad, thereby become problem.
So, among the present invention, in forming process,, thrust pin 5 with the interior void portion that is communicated with atmosphere towards described hollow chamber 23.
Like this, be communicated with atmosphere by the hollow chamber 23 of the outer wall 21 of intercalation part 2a and inwall 22 obturations, hollow chamber 23 pressure inside promptly reach atmospheric pressure.Consequently, can prevent to be accompanied by the distortion (destruction) of the outer wall 21 that volume reducing that temperature because of forming process reduces the hollow chamber 23 that produces brings effectively.
Below according to Fig. 2, the manufacture method of bellows 1 is elaborated.Fig. 2 is the figure that forms a status of processes of bellows 1 in the expression manufacture method of the present invention.
Bellows 1 is the pipe that the thermoplastic resin by molten condition is formed, the member that is shaped as the body of the double wall of inside and outside wall structure, wherein inside and outside two-layer annular lamina (dice) g of the extruder inside from be located at Fig. 2, represented of the thermoplastic resin of above-mentioned molten condition with symbol G with regulation shape 1, g 2Middle extruding.
More particularly, bellows 1 is carried out interior pressure under the temperature below the above fusing point of the softening point of the thermoplastic resin that is extruded, and the metal module 7 of the internal face with regulation shape that forming machine 6 is possessed invests its shape by extruding outer wall side resin.And the symbol 9 among Fig. 2 is the axles that feed cooling water to inside, and symbol 10 is air blast portions.
As the method for molten resin being connected airtight on forming machine 6, any one of the vacuum forming method that can adopt the air blast forming process of utilizing forced air to expand, the metal pattern inner wall area is vacuumized.
The thermoplastic resin that uses in the manufacture method of the present invention is polyvinyl resin, acrylic resin, vinyl chloride resin, particularly, considers the preferably polyethylene resin from formability, weldability and mechanical strength aspect.
Here, described forming machine 6 has shaping function, refrigerating function, pulling function simultaneously.In addition, on this forming machine 6, utilize the internal circle groove 8 of regulation shape that the metal module 7 of the outer wall of the described pipe of a pair of formation up and down is set.
This metal module 7 is with the regulation multiple metal pattern that is linked in sequence, along the direction of extrusion molten resin, and Continuous Drive as crawler belt.
Metal module 7 by the main part of the shaping of the outer wall 11 of the center main part of undertaking bellows 1 with metal pattern 7a, undertake the intercalation part metal mould for formation 7b (7b of shaping of the outer wall 21 of intercalation part 2a 1, 7b 2), the metal mould for formation 7c of socket portion of shaping that undertakes the outer wall 31 (with reference to Fig. 1) of socket portion 3 constitutes.These metal patterns 7a～7c is connected, is disposed according to the mode corresponding with the outer wall shape of bellows 1.
Here, in the manufacture method of the present invention, constitute two the metal pattern 7bs of described intercalation part with metal pattern 7b 1And 7b 2In, at the metal pattern 7b of the rear side that is disposed at direction of extrusion X 2On, the pin 5 that is used for perforate on the assigned position of outer wall 21 is installed.
The operation (thrusting operation) of utilizing pin 5 perforates is the process that forms outer wall 11,21,31 successively with the mobile coupling ground of described forming machine 6 by utilizing, and makes to be installed in metal pattern 7b 2On the action coupling of pin 5 and forming machine 6, thereby perforate is carried out on the assigned position of the outer wall 21 of intercalation part 2a.
And, for the situation of vertical forming machine, produce up and down the characteristic of rotation continuously, pin 5 is installed on upper-lower position, for the situation of horizontal forming machine,, pin 5 is installed in the horizontal direction according to identical consideration.
Here, the pin 5 that perforate is used preferably its cephalic par 5b is a acute angle as cutter, and is the tubular of interior void as syringe.Material is stainless steel, copper, aluminium, glass, Merlon, preferred especially stainless steel.The radical of the pin of installing be 1 or 2 can.
Below, Fig. 3 (A) is near the part sectioned view that is particularly suitable for the cephalic par 5b of pin 5 of manufacture method of the present invention, is the partial front elevation view of inclined plane 5c of the cephalic par 5b of the described pin 5 seen from the arrow P direction of Fig. 3 (A) with figure (B).According to these figure the formation of pin 5 is illustrated simply.
Pin 5 possesses the drum with the 5a of interior void portion, and cephalic par 5b is cut along an incline direction, and is very sharp keen, and the inclined plane 5c that the 5a of interior void portion is opened on this cephalic par 5b goes up (with reference to Fig. 2 (B)).The 5a of interior void portion is the formation that is communicated with atmosphere.
Here, pin 5 is at the metal pattern 7b of its cephalic par 5b from the shaping of the outer wall 21 of undertaking intercalation part 2a 2The outstanding state of internal face under be mounted.Pin 5 is utilizing this metal pattern 7b 2Form the time of the outer wall 21 of intercalation part 2a, outstanding to the outside of described outer wall 21, the cephalic par 5b with inclined plane 5c of opening is thrust in the hollow chamber 23.Like this, pin 5 is promptly brought into play the effect that hollow chamber 23 is communicated with atmosphere.
Experiment 1
Here, the present application people waits and has carried out being used for to being suitable for the experiment 1 that pin of the present invention is selected and verified.
Its result is illustrated among the additional figure (table) 5.And this experiment 1 is to carry out under following condition, that is, and and bellows material: polyvinyl resin, product size: internal diameter 250mm, wall thickness 10mm, the material of pin: stainless steel, the external diameter of pin: 8mm.Evaluation is face shaping to be carried out visual, estimates with 2 stages.
And in figure (table) 5, * expression is because not perforate is therefore bad, and o represents because perforate successfully is therefore good.
Can be clear that from this figure (table) 5 suitable pin is the pin with form shown in the symbol 5 among Fig. 3 in the manufacture method of the present invention.That is, see the cephalic par 5b that (being under the state of seeing from the arrow S direction of Fig. 3 (A), Fig. 3 (B) specifically) has the profile of the shape that is Japanese katakana " レ " from the side.
On the other hand and since have the cephalic par of the taper shown in Fig. 4 (A) pin 51, have a cephalic par of the inverted v-shaped shown in Fig. 4 (B) pin 52 can't perforate, therefore be not suitable for.This is because have by the frictional resistance minimum of the cephalic par 5b of the inclined plane 5c that cuts along a direction of pin 5.
Experiment 2
Then, the present application people waits the experiment 2 carried out being used to determining the installation direction that is fit to of pin 5.Its result is illustrated among the figure (table) 6.
And this experiment 2 is to carry out under following condition, that is, the bellows material: polyvinyl resin, product size: internal diameter 250mm, wall thickness 10mm, the material of pin: stainless steel, the external diameter of pin: 8mm, evaluation is by visual, estimates with 2 stages.In table 2, * expression is because not perforate is therefore bad, and o represents because perforate successfully is therefore good.
Fig. 7 is the figure that is used for specifically describing the perforate situation that described experiment 2 carries out, and is the figure of the perforate situation of expression experiment No.1 with figure (A), is the figure of the perforate situation of expression experiment No.2 with figure (B).
At first, in this experiment 2, the cephalic par 5b of pin 5 selects to be connected with intercalation part 2b the facial 2c of the inclined wall of abandoning bag 2c of portion of setting in forming process 1And thrust.
Its reason is, abandons bag 2c of portion owing to be the part that is cut eliminating, even therefore perforate can not have problems yet, in addition, by pin 5 is thrust towards with the oblique inclined wall 2c of extrusion molding direction X rightabout inclination 1, the cephalic par 5b with crooked peristome just can bring into play the function of similar scoop, thereby can further reduce friction resistance.
That is, abandon the facial 2c of inclined wall of bag 2c of portion 1With the inclined plane 5b of pin 5 under the situation that an opposite side with direction of extrusion X is thrust, be suitable for as position of opening most.
From also can understanding with experiment 2 related figure (table) 6 and Fig. 7, among the experiment No.1 of this experiment 2, promptly, with pin 5 according to inclined plane 5b in the formation (with reference to Fig. 7 (A)) that the mode of an opposite side with direction of extrusion X is installed, pin 5 is successfully thrust.
But, among the experiment No.2, promptly, with pin 5 according to inclined plane 5b towards with the direction of extrusion X formation that the mode of the same side is installed mutually in owing to just push the facial 2c of inclined wall 1And make it distortion (with reference to the symbol 2c of Fig. 7 (A) 2), therefore can't perforate.
In the manufacture method of the present invention,, and this inclined plane 5b is compared obviously easier perforating when the direction identical with the extrusion molding direction when the inclined plane 5c of the cephalic par 5b that makes pin 5 like this is fashionable towards the direction thorn opposite with extrusion molding direction X.
The industrial possibility of utilizing
According to the manufacture method of double-wall corrugated tube of the present invention, utilize to be installed in intercalation part is shaped Pin on the metal pattern, can and the driving of forming machine make linkedly, simply hollow chamber between inside and outside wall Be communicated with atmosphere, therefore can produce reliably the plug of the shape with the homogeneous that does not have distortion in batches The double-wall corrugated tube of section.
In addition, the manufacture method of double-wall corrugated tube of the present invention does not need numerous and diverse device, in addition, Even need not carry out during fabrication complicated preparation, also can be on the intercalation part outer wall perforating, therefore Can the cutting device cost, operating efficiency also is improved.

Claims (4)

1. the manufacture method of a double wall bellows, be at one end to have socket portion by the thermoplastic resin extrusion molding is made, the other end has intercalation part, outer wall is continuous concaveconvex shape, inwall is the method for the double wall bellows of tubular, it is characterized in that, before the described double wall bellows cooling that is extruded, on the intercalation part outer wall section, thrust pin and perforating, by the intercalation part hollow chamber is communicated with atmosphere, prevent to be accompanied by the distortion that temperature reduces the outer wall of the described intercalation part that produces.
2. the manufacture method of double wall bellows according to claim 1 is characterized in that, described pin is installed on the metal pattern of described intercalation part outer wall shaping usefulness, with the action of forming machine perforating on described intercalation part outer wall linkedly.
3. the manufacture method of double wall bellows according to claim 1 and 2 is characterized in that, described pin is the tubular of the interior void that is communicated with atmosphere, has cephalic par and sees the approximate inclined plane that is the shape of Japanese katakana " レ " from the side.
4. the manufacture method of double wall bellows according to claim 3 is characterized in that, the described inclined plane of described pin by towards with extrusion molding side in the opposite direction.
CNB028271963A 2002-01-23 2002-11-25 Method for producing double-wall corrugated tube Expired - Fee Related CN100357085C (en)

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JP2002013732A JP2003211522A (en) 2002-01-23 2002-01-23 Method for manufacturing double-wall corrugated pipe
JP13732/2002 2002-01-23

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CN1615214A true CN1615214A (en) 2005-05-11
CN100357085C CN100357085C (en) 2007-12-26

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EP (1) EP1468808A4 (en)
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CN110087853A (en) * 2016-11-16 2019-08-02 莱尼电缆有限公司 Method and apparatus for manufacturing strand product
CN115989130A (en) * 2020-09-11 2023-04-18 八千代工业株式会社 Injection pipe and method for manufacturing injection pipe

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DE102017128805A1 (en) * 2017-12-05 2019-06-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method and device for producing a corrugated pipe
CN110744800B (en) * 2019-10-31 2021-05-25 重庆市一龙管道有限公司 Steel strip spiral corrugated pipe production mold and corrugated pipe production method
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CN102859246A (en) * 2011-04-21 2013-01-02 嘉纳福株式会社 Hollow synthetic resin cylinder
CN102859246B (en) * 2011-04-21 2014-11-19 嘉纳福株式会社 Synthetic resin cylinder
CN110087853A (en) * 2016-11-16 2019-08-02 莱尼电缆有限公司 Method and apparatus for manufacturing strand product
US11289242B2 (en) 2016-11-16 2022-03-29 Leoni Kabel Gmbh Method and apparatus for producing an extrudate
CN115989130A (en) * 2020-09-11 2023-04-18 八千代工业株式会社 Injection pipe and method for manufacturing injection pipe

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EP1468808A4 (en) 2009-08-05
JP2003211522A (en) 2003-07-29
US20060119013A1 (en) 2006-06-08
CN100357085C (en) 2007-12-26
EP1468808A1 (en) 2004-10-20
WO2003061943A1 (en) 2003-07-31

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